(19)

(11)

EP 1 687 370 A1

(12)

(43) Date of publication: 09.08.2006 Bulletin 2006/32 (21) Application number: 04791002.1 (22) Date of filing: 29.10.2004

(51) International Patent Classification (IPC):  C08L 7/00(2006.01) C08L 15/02(2006.01) C08L 21/00(2006.01) C08L 23/28(2006.01) (86) International application number: PCT/EP2004/012237 (87) International publication number: WO 2005/049724 (02.06.2005 Gazette 2005/22)

(84) Designated Contracting States: AT BE BG CH CY CZ DE DK EE ES FI FR GB GR HU IE IT LI LU MC NL PL PT RO SE SI SK TR (30) Priority: 30.10.2003 FR 0312743 (71) Applicants: Société de Technologie Michelin 63000 Clermont-Ferrand (FR) MICHELIN RECHERCHE ET TECHNIQUE S.A. 1763 Granges-Paccot (CH)	(72) Inventors: CHASSAGNON, Robert F-63200 Riom (FR) VASSEUR, Didier F-63100 Clermont-Ferrand (FR) (74) Representative: Ribière, Joel  M.F.P. Michelin, SGD/LG/PI - F35 - Ladoux 63040 Clermont-Ferrand Cedex 9 63040 Clermont-Ferrand Cedex 9 (FR)